Humminbird LCR 8000D User manual

Brand: Humminbird

Model: LCR 8000D

Type: User manual

This manual is also suitable for

TRANSDUCER MOUNTING PROCEDURE

Humminbird’s high-speed transducer is supplied with your LCR. This transducer has been

designed to give good high speed readings on most all boat designs, including aluminum.

Please carefully consider the following before installing your transducer.

TRANSDUCER MOUNTING OPTIONS

A. Transom Mount- The Humminbird high speed transducer allows the transducer element to be

mounted below the bottom of the boat hull keeping the transducer out of turbulent water and

insuring good high speed operation. The transducer will absorb the blow of any obstruction

by rotating up out of the metal spring bracket without harming the transducer, or your boat.

The transducer can be re-engaged by simply rotating the transducer down and snapping it

back in place. (See Figure A)

B. Inside Hull Mount- The high speed transducer can be mounted inside the hull (without pivot

assembly) using the proper two-part epoxy, such as Humminbird’s epoxy kit. Even though

there is some loss of signal in shooting through the hull, your LCR will perform well with this

type of installation. You cannot shoot through the hull of an aluminum boat.

C. Trolling motor Mount- This type of transducer is not supplied with your LCR. It is designed to

mount on the foot of a trolling motor. You may exchange your un-used high speed

transducer for a trolling motor transducer. Call the Humminbird Customer Service

Department.

D. Bronz Thru-Hull Mount- This transducer is not supplied with your LCR but for an additional

cost you may exchange your un-used high speed transducer for a bronz thru-hull. The bronz

thru-hull transducer has a threaded stem which installs through a hole drilled in the boat hull,

leaving the housing exposed under the boat. This type of installation must be used for many

boats with in-board engines, because there is no suitable location on the transom away from

the noise and turbulence created by the prop. A bronz thru-hull transducer should be installed

by qualified personnel only.

The LCR will operate well at high speeds with a properly mounted transducer. Remember, a

transducer will not work transmitting through air or through air bubbles.

1. TRANSOM MOUNTING PROCEDURE

Step 1.

MOUNTING LOCATION- It is important that the transducer be mounted on the transom where

water flow is in constant contact with the transducer. You may wish to observe the rear of the

boat while it is moving through the water to determine the best mounting location.

Step 2.

BRACKET INSTALLATION (Aluminum Boats)- To install the metal bracket on an aluminum boat

locate the template on the transom between rows of rivets, or ribs that are on the bottom of the

boat. Align the template so that the bottom corner of the template nearest the center of the

transom is on the bottom edge of the transom.

Once the location is determined mark and drill three 7/64” dia.. holes noted on the template.

Attach the metal bracket using three #10 self threading screws supplied. Be sure to align holes in

the center of the

Bracket slots. On some aluminum boats it may be necessary to use a wood back-up plate. It is

important to use a silicone sealant between the screwhead and bracket in order to prevent

leaking. (See Figure C)

Step 2.

BRACKET INSTALLATION (Fiberglass Boats)- If your boat has a stepped transom located

below and under the main transom, the compact transducer design allows mounting in this area.

This mounting location is recommended for good reading at very high speeds. (See Figure D)

To install the metal bracket on a fiberglass boat, locate the template on the transom in the same

manner as for an aluminum boat. (See Figure C)

NOTE: On boats with more than 15 degree deadrise angle it may be necessary to mount the

transducer slightly off parallel with the water level. (See Figure E)

Mark and drill the three 9/64” dia. holes as shown on the template. Attach the metal bracket using

the three #10 self threading screws supplied. Be sure to align the holes so that they are centered

vertically in the three slots found in the bracket. It is important to use a silicone sealant between

the screwhead and bracket in order to prevent leaking.

Step 3.

TRANSDUCER PIVOT ASSEMBLY- Assemble the pivot to the transducer main body using the

two ¼”x5/8” allen head screws, two 3/8” tooth washers and two, ¼” square nuts. Make sure the

tooth washers are sandwiched between the transducer main body and the pivot. The square nuts

are trapped inside the pivot and will not rotate as the allen head screws are tightened.

HOWEVER, DO NOT TIGHTEN AT THIS POINT. (See Figure F)

Step 4

TRANSDUCER ASSEMBLY- Insert the transducer assembly into the metal bracket from the

bottom. Push up until the holes in the plastic pivot align with the uppermost holes in the bracket.

Slide the O-ring on to the headed pin and insert it through the two parts. Assemble by screwing

the ¼”x3/8” allen head screw into the end of the pin and tighten. (See Figure G)

Step 5

ANGLE ALLIGHMENT- Set the transducer angle so that it is parallel with the bottom of the boat

hull. Once proper alignment is achieved, tighten the two allen head screws using the 5/32” allen

wrench provided. The screws are visible through the access holes on each side of the metal

bracket. Check to make sure the transducer main body is rigidly fastened to the pivot. (See

Figure H)

Step 6

CHECK POSITION OF TRANSDUCER- At this point, check to see that the bottom of the

transducer is a minimum of ¼” below the bottom of the transom. (However, as noted in STEP 2,

the top of the transducer cannot fall below the bottom of the transom). If it is not, remove the

transducer assembly from the metal bracket by removing the pin installed during STEP 3. Loosen

the metal bracket mounting screws, re-position the bracket utilizing it’s slotted holes, tighten and

re-assemble. It may be necessary to replace the silicone sealant after this adjustment is made.

NOTE: It may be necessary to make several high speed runs to adjust transducer either

UP/DOWN or to re-adjust the angle to achieve optimum results.

Step 7

CABLE CLAMPS- Install cable clamps as necessary by drilling a 1/8” dia. hole for the # 8 screw

supplied.

2. INSIDE HULL MOUNTING PROCEDURE

Warning: In order to achieve proper results with this type installation, it is important that the

transducer be mounted by someone familiar with the use of two part epoxy adhesives. For this

reason, Techsonic Industries, Inc. will not be responsible for any damage due to the mounting of

your transducer in this manner.

NOTE: An Epoxy Kit (Part N. EPK) is available from Humminbird. This Epoxy Kit has been

formulated for Inside Hull Transducer Installation.

1. Select as flat an area as possible near the aft end and center of boat where the hull is thin

and not double. If the bottom has a runner down the center of boat, select an area to one side

of the runner, but as close to the runner as possible.

2. Clean the inside of the boat with lacquer thinner in the area transducer is to be mounted.

Outside of boat in this area should also be cleaned. (Not with lacquer thinner).

3. Put approximately one inch of water in the bottom of the boat.

4. Put transducer in the water. The bottom of the transducer should be in a flat area and should

be in good contact with the bottom of the boat.

5. Operate the LCR with the boat operating at high speed. The transducer may have to be

moved in order to find an area where satisfactory operation is observed.

6. When an area is found that produces satisfactory operation, mark the location of the

transducer.

7. Remove the water and transducer and clean the marked area and the bottom of the

transducer thoroughly.

8. Using the Humminbird Epoxy Kit or equivalent, mix an ample amount of epoxy without

causing it to bubble and pour it in the area the transducer is to be mounted. The puddle

should be larger than the bottom of the transducer.

9. Coat the bottom of the transducer with epoxy, then put it in the center of the puddle and push

down on the transducer while moving it around in a circular motion. This forces out any air

bubbles that may be trapped between the bottom of the transducer and the hull of the boat.

10. Let epoxy cure then the transducer is ready to operate. No water is now required in the

bottom of the boat and gas and oil that is spilled inside of the boat will not degrade

performance as it will if the transducer is placed only in water.

CAUTION: Do not use the silicone seal or any soft adhesive to bond the transducer to the

hull. This will reduce the sensitivity of the unit.

CAUTIONS

1. Occasionally the “eye“ of your transducer may become dirty from storage or from contact with

oils present in boats or marina environments. (Oil will cause the “eye” to lose the intimate

contact with the water which is necessary for efficient operation.) The “eye” may be cleaned

with liquid detergent.

2. Improper installation of the transducer can alter the efficiency and accuracy of the entire

system.

3. If your boat of transducer is out of the water for a period of time, it may take a short period of

time for the transducer to become thoroughly “wetted” when returned to the water. Also, re-

entry may cause turbulence, which will create air bubbles in the “eye” of the transducer. The

bubbles will disappear in a short time or can be removed by rubbing the transducer “eye” with

your fingers while the transducer is in the water.

4. If your instrument should fail to function, be sure to check all the electrical connections before

removing the transducer or calling a serviceman.

5. Inspect your transducer cable and make sure that it has not been cut or damaged to the point

where it will affect the performance of the transducer. A slight nick or cut, exposing the outer

cable, can be repaired by wrapping with electrical tape. A transducer can be damaged if the

inner cable and outer cable are allowed to make contact. Such a problem can sometimes be

corrected by properly splicing the coaxial cable. This should only be attempted by a qualified

service technician.

6. If your LCR is not working properly and you suspect the problem might be in your transducer,

we would recommend you borrow a unit from a friend and try it on your boat. If the symptoms

are the same, you can almost be certain that the problem is in the transducer.

INSTALLING THE LCR

The LCR should be mounted on a flat, solid surface for maximum stability. The low profile swivel

mount has four holes drilled in the base. It is recommended that all four holes be used.

Position the swivel base and drill four ¼” diameter holes. Note: The LCR hole pattern Is the same

as for all Humminbird flasher units. Use hardware provided to mount this base to the boat.

Next place the gimbal bracket on the swivel base and attach with four small machine screws,

provided.

Place the LCR in the gimbal mount and make certain the rubber washers provided are placed

between the unit and the gimbal bracket Important: Note which side of the gimbal faces forward.

(Slots on gimbal bracket go towards rear). Also, rubber washer must be located between the unit

and the gimbal bracket.

Install the mounting knobs and tighten snugly. The unit can now be swiveled and tilted to any

desired position.

OTHER MOUNTING OPTIONS

1. The LCR gimbal bracket can also be mounted on the SM-4, quick disconnect swivel mount.

2. The LCR gimbal bracket can also be mounted directly to the dash without the swivel mount,

however, this method is not recommended sinc

e the unit cannot be rotated.

INSTALLING THE CABLES

Your LCR comes equipped with Humminbird’s new Angle-Lock power and transducer

connectors. The power connector is identified with the letter P on the back of the plug.

It plugs into the outlet on the back of the unit marked “Power”. The transducer connector is

identified with the letter T and plugs into the outlet on the back of the unit marked “Transducer”.

Note: An adapter (AD-4) is available to allow use of an old waterproof (BNC) transducer with the

LCR, but be sure that the transducer is a 16degree. A 32-degree transducer cannot be used.

A 11/8” hole must be drilled to pull through the transducer connector. After drilling the hole, pull

the transducer connector up through the hole. If you are installing two units, both transducer

connectors can be pulled through this 1 1/8” inch hole. Next, push the power cable wires down

through the hole. A hole cover has been provided which will dress and hold the wires. Install the

hole cover after determining the necessary wire length from the hole.

The power cable has a red lead to the positive (+) post and the black lead to the negative (-) post.

Install a 1 amp fuse between the red cable and positive post of your 12-volt battery.

If a fuse panel is available, we recommend wiring the power cable into the fuse panel. Note: The

LCR must be fused separately from any other accessory.

Your Angle-Lock connectors can only be plugged in one way. Position the connector so the letter

P or T can be read and the 90 degree bend is pointed downward. Push the connector in as far as

it will go. Turn the positive locking ring as far as it will go clockwise until you feel it lock. Locking

ring as far as it will go clockwise until you feel it lock. Your connector is now locked into place.

Note: For easy access to the connectors, simply loosen the mounting knobs and tilt your LCR

forward. The connectors are now in full view and easy to plug or unplug.

THEORY OF OPERATION

Your Humminbird LCR works on the basic principal of sonar. An electronic signal is generated

within the control head of the unit. When coupled to the transducer, this signal is converted to an

ultrasonic signal and is transmitted toward the bottom. The speed of the ultrasonic signal traveling

through the water is approximately 4800 feet per second.

The signal travels through the water until it strikes an object or the bottom. At this instant it is

reflected back, picked up by the transducer, reconverted to an electronic signal and is recorded

on the display of the LCR.

The reading at the far right postion of the screen shows what is being passed over at that time.

As new information is received, the old information is shifted to the left and the new information is

added. The information is retained until it disappears from the left side of the screen. Figure 1

illustrates a typical display.

One of the unique features of your LCR is the Split Screen Zoom with Total Screen Update.

Figure 1 shows a Split Screen Zoom display with the full depth range information on the right and

the expanded view on the left. The Total Screen Update feature is explained in detail later, but

basically with Zoom the Total Screen Update allows you to zoom in on an area even after you

have passed by it. The display resolution on the expanded portion of the screen is as good as 3

inches per dot, giving you exact detail while still viewing the full depth range information on the

right.

The display used on the LCR is a Liquid Crystal Display. The material in the display is a liquid

that can be aligned such that it either "blocks" light or it lets light pass through. This "blocking" of

light is what makes the black dots on the screen.

Since the LCR's display depends on light passing through it to make the images, increasing the

light source will make it easier to see. This is why your LCR can be seen so well in direct sunlight.

You will also notice that the display can be seen better at certain angles. The LCR mounting has

been designed for tilting and pivoting so that you can easily maintain a good angle for viewing.

Another characteristic of an LCD display is that you may find that some polarized glasses might

effect the view by causing a rainbow prism to appear. This condition can possibly be improved by

a slight adjustment in tilt.

SPLIT SCREEN OPERATION

The LCR 8000's split screen feature will allow you to make sideby-side comparisons. You will be

able to split the screen and compare the actual, full depth scale information with three functions

(1) zoom, (2) bottom lock or (3) screen memory.

Use of the split screen capabilty is very easy. Whenever any of the three functions is activated

the screen automatically splits, with the right half of the screen showing the current full depth

scale information and the left half showing zoom, bottom lock, or screen memory. (See Figure

14). NOTE: If zoom or bottom lock is on when recalling a memory screen, then the memory

screen will be on the right so that it can be compared to zoom or bottom lock.

When zoom is activated, for example, the left half of the screen shows the expanded information

while the right half shows the full depth scale information. No other depth sounder can give you

this kind of comparative advantage.

The zoom range can be moved up or down to search out any area, allowing you to compare on

one screen both the full scale view and the expanded up-close information. Even the depths of

the upper and lower part of the zoom region are digitally displayed for precise location of fish and

structure.

The bottom lock and screen memory work in the same way to give you the benefit of split screen

comparisons. The detailed operation of each of these functions is explained later in this manual.

TOTAL SCREEN UPDATE

What is Total Screen Update?

Total screen update is a unique feature of Humminbird LCR's. It will allow you, when changing

depth scales, to totally change or update the screen to the new depth scale. It will allow you to

zoom in and look at information in much finer detail even after you've already gone over the area.

How Does Total Screen Update Work?

Inside the LCR are memory devices which can store approximately 120,000 bits of information.

Automatically, while you're operating the LCR, the computer is putting information into the LCR's

memory.

All this information is being put into memory in much smaller increments (pieces) than is being

displayed on the normal full depth scales. For example, on the 0 to 60 foot scale each dot is

equal to one foot of depth, but the computer is putting information into memory such that each dot

equals 3 inches.

If after reading this, you don't understand now Total Screen Update works, don't worry. The

important thing is that you understand how to use Total Screen Update. Read on....

How To Use Total Screen Update

This is the easiest part. Since the LCR's computer is doing all the work, you will find the LCR

Total Screen Update very easy to use.

There are two ways that you will use Total Screen Update:

1. When changing a depth scale, the LCR's computer will automatically change or update

the entire screen to the new depth scale. This Total Screen Update feature works when

changing to deeper or shallower scales. For example, suppose you are in the 0 to 120

foot scale but the bottom depth changes quickly to 20 feet. When the depth range is

changed to the 0 to 30 foot scale, the entire screen will look just as if you had gone over

the area on the 0 to 30 foot scale.

2. The second way that you will use Total Screen Update is in operating the LCR's Zoom or

Bottom Lock. Since the computer has stored in memory information in very small

increments, you will be able to recall this information from memory to get an expanded

view of areas which you have already passed over.

For example, if you go over some interesting structure or fish, you will be able to zoom in for a

closer look without going back over the area. Simply activate the zoom and the in-

formation that is stored in memory will be recalled and displayed on the left side of the screen.

(See Figure 15.)

The operation of the zoom function is explained in a later section.

OPERATIONAL INSTRUCTIONS FOR LCR 8000 and LCR 8000D

The Humminbird LCR 8000 or 8000D will operate fully automatic or manual at the discretion of

the operator. At the heart of the LCR are 3 microcomputers which are making thousands of

decisions every second. With the LCR's automatic features you will quickly and easily learn the

basics of operating your unit and after a couple of trips on the water you'll be operating the LCR

like an expert. It is suggested that you familiarize yourself with each of the features and controls

prior to operating your LCR.

1. Power. To activate the unit, depress the Power "On" switch. The LCR always comes on

in the automatic mode. In the automatic mode, the unit will find the bottom by varying the

sensitivity and selecting the proper depth range for a satisfactory return. Also, the display

below the bottom is blacked out to make the display easier to read.

To turn the unit off, depress the Power "Off" switch.

2. Light: Depress the light "On/Off" switch to activate the display light for night or low light

conditions. The light is turned off again depressing the "On/Off" switch.

When using the night light you will notice that the viewing angle, or best viewing position

is different than during daylight operation. Tilt the unit back until you find the best angle

for night viewing.

3. Set: The LCR has two Set buttons labeled A_ (increase) and * (decrease). These buttons

are used to change five functions:

A Depth range. D Zoom Range.

B Display Sweep Speed. E Alarm Depth Setting.

C Manual Sensitivity Level.

You should notice that each of these buttons are light gray indicating that they are used

with the A and * buttons.

To change any of these functions, first the function button should be pressed and then

the or *to increase or decrease the function. It is not necessary to hold down the function

button while pressing the A or * button. Simply press the function button once and then

press the A or buttons.

When a function (light gray) button is pressed it will remain active until another function

button is pressed. So that, for example, if you had been changing the zoom range and

later want to change it again, you can just press either the or V button if no other function

(light gray) button had been pressed since the zoom range button.

4. Depth: Automatic Mode: - In the automatic mode, the proper depth range is found as

soon as the unit is turned on. As you move into deeper water and the bottom goes off

the screen, the next deeper depth range will automatically be activated. Also, as water

becomes shallower the depth range will automatically change to the next shallower

scale. As the depth range changes, the scales to the right of the display will also change

indicating the maximum depth of that range and also intermediate depths at one-third

and two-thirds of the full scale.

The LCR 8000 has five depth ranges: 0 to 15 Ft., 0 to 30 Ft., 0 to 60 Ft., 0 to 120 Ft., and

0 to 240 Ft. The LCR 8000D has seven depth ranges: 0 to 30 Ft., 0 to 60 Ft., 0 to 120 Ft.,

0 to 240 Ft., 0 to 480 Ft., 0 to 960 Ft., and 0 to 1500 Ft. You may manually change the

depth range by pressing the depth set button and then either the increase or decrease

button. Each time one of the set buttons is depressed the range will change by one

setting.

Note: Should you attempt to change to a depth range which is less than the actual bottom

depth, the computer will automatically change the depth range back to the proper

position. For example, if you are in 40 feet of water and you change the depth range to

30 feet, the computer will automatically change back to the 60 foot range.

Manual Mode: - In the Manual Mode (See Paragraph 7 below) the automatic range

change is not active. This means that you must manually set the depth range. For

example, if you are on the 0 to 30 foot range and the bottom goes from 25 feet to 35 feet,

you press the depth set button and then the (increase) button to change to the 0 to 60

foot range.

The depth range can also be changed by only pressing the depth set button. Each time

this button is pressed the depth range will decrease (become shallower).

Remember that because of the LCR's Total Screen Update feature, information is

automatically being put into memory in smaller increments (pieces) than is being

displayed on the normal depth scales (see explanation of Total Screen Update earlier in

manual). This means, for example, that even though you are on the 0 to 240 ft. scale,

when you change to the 0 to 30 ft. scale the information will be displayed just as if you

had been on the 0 to 30 ft. scale all along. No information or resolution is lost.

5. Display Stop/Resume: Anytime during the operation of the LCR you may stop the display

by simply pushing the Display Stop/Resume button. This button has been highlighted

with a yellow circle to make it easy to find. This feature will aid in the learning and

interpretation of the display by giving you time for study. When the display is stopped the

display speed and sensitivity setting cannot be changed.

If Display speed or sensitivity is pressed a chirping sound will indicate an incorrect entry.

When the Stop/Resume button is pressed again the unit will resume reading at the

immediate point at which the boat is sitting in the water.

6. Display Speed Set: The LCR has 8 display speed settings.

When the unit is turned on the display will be advancing at a medium speed. To increase

the display speed, depress the Speed Set and or hold it down to change rapidly. An

audible sound is heard each time the speed is advanced. When the limit has been

reached a chirping sound will be heard. At this point the speed will be advancing at its

maximum. To decrease the speed, simply depress the Speed Set and * until the desired

advance is reached.

It is suggested that you experiment with various display speeds until you achieve the

desired results. You should select the fastest display speed for high speed operation, but

use a slower display speed for idle or trolling speed.

7. Sensitivity: Automatic Mode: - Each time the unit is turned on, the automatic feature is on.

In the automatic mode the sensitivity is adjusted automatically to give a good return and

the correct depth range is selected. The word Auto will appear in the lower left corner of

the display. The sensitivity bar at the bottom of the screen will increase or decrease

automatically indicating the amount of sensitivity being used. In deeper water or soft

bottom conditions this bar will increase indicating more senistivity. In shallow water or

when a hard bottom is being read, the sensitivity needed to achieve a good return will be

less. Also in the automatic mode, the unit will black out the display beneath the bottom

line.

Manual Mode: - There are two ways of putting the LCR in the manual mode; (1) Depress

the Auto On/Off button or (2) Depress the Manual Set button and then either the

decrease or _• increase button. There are 15 sensitivity settings. When the * or • or

button is pressed once, the sensitivity setting at the bottom of the screen will change by

one division. If the • or A button is held down the setting will move up or down as long as

the button is held down. When the maximum or minimum setting is achieved, the unit will

make a "Chirping" sound indicating a limit has been reached.

Also, the word "max" will appear when the maximum sensitivity setting is reached.

In the manual mode everything below the bottom is no longer blacked out, therefore a

second return or double echo can be displayed if desired. (See Figure 17). Also, the

hardness of the bottom can sometimes be determined by the thickness of the bottom

return. For example, a hard or rock bottom will give a wider bottom return as compared to

a soft or muddy bottom.

Manual Mode

In manual mode everything below the bottom is not blacked out, so that the second

bottom echo can be seen.

Note: You will find the manual sensitivity control most useful when looking for smaller

targets such as smaller fish. In the automatic mode the computer might not be using

enough sensitivity to show smaller targets. At higher sensitivity settings more targets will

be seen. Therefore, you might want to use the automatic mode while running and then

use the manual mode for charting and finding fish.

You should also note that it is possible to have the sensitivity set too high such that

reflection off of suspended matter or air bubbles will begin to black out the display.

In the manual mode the depth scale does not change automatically (See Paragraph 4

under Manual Mode). To once again activate the automatic mode, depress the Sensitivity

Auto "On/Off" button.

If you get confused while in the manual mode, for example if you don't know where the

bottom is, then press the Auto On/Off button to turn on the Automatic Mode. The LCR will

find the bottom by selecting the proper sensitivity level and depth range. You can then go

back to the manual mode if desired.

8. Zoom and Bottom Lock:

You will find the split screen zoom of the LCR to be a very valuable tool. The Zoom

Range is controlled by the set and A or * buttons. Each time one of these buttons is

depressed the zoom region will move one division. If the button is held down the region

will continue to move as long as the button is held down.

The zoom region is indicated by a group of bars at the right side of the display. The size

of this region may be selected as 15 feet, 30 feet, or 60 feet pressing the range size

button. Each time this range size button is pressed the zoom range size increases until it

is at the maximum, then the size goes back to the minimum. The following table shows

the display resolution at each zoom range size:

Zoom Range Each Dot Equals

15 ft. 3 inches

30 ft. 6 inches

60 ft. 12 inches

What Zoom Does:

The zoom feature of the LCR will allow you to look at underwater readings in very fine

detail. With the split screen capability you will be able to see both the full scale

information and the up-close view at the same time on the same screen. And with the

LCR's Total Screen Update you have the ability to zoom in on bottom, fish, and structure

even after you have gone past an area.

How To Use Zoom:

First, position the zoom region next to the area that you want to expand by pressing the

range set button and then the* or;* button. Next, by pressing the Zoom/Bottom Lock

button the zoom will be activated. When the zoom is turned on, the display screen will

automatically split to show the full depth scale information on the right side and the

expanded view on the left side. Also, just above the word zoom on the left side of the

display will be a group of small arrows indicating that zoom is on. (See Figure 18).

The information on the left side of the display is an expanded view of the area from the

top of the zoom region to the bottom of the zoom region. The exact depth of the top and

bottom of the zoom range will be displayed in the upper and lower left corners of the

screen. As the zoom range is moved up or down these numbers will change to indicate

the exact setting of the zoom range. These depth indicators will be very useful in

pinpointing the exact depth of fish or structure.

The zoom may be activated at anytime but while learning to use the zoom feature you

might find it easiest to first press the Stop/Resume button to freeze the display. Now you

can select the zoom range size, position it, activate the zoom and have time to study the

display.

While the zoom is turned on you can move the zoom range up and down. This will allow

you to search or look at an entire area in fine detail. The LCR's Total Screen Update

feature allows you to zoom in on an area even after you have passed over it.

Remember that because of the LCR's Total Screen Update feature even while you are

using Zoom, no information is being lost. You can turn Zoom off, go to any depth range

and see all the information just as if you had been on that depth range all long.

Bottom Lock: - Bottom Lock can be turned on only when the LCR is in the automatic

mode and zoom is off. To activate bottom lock, hold down the Zoom/Bottom Lock button

for 1 to 2 seconds (the key panel has a "Dash" by the BL symbol indicating that you must

hold down to activate bottom lock). When bottom lock is activated the screen will

automatically split to show the full depth scale information on the right and an expanded

view from the bottom up on the left. Just above the word Bottom Lock on the left side of

the display will appear a group of arrows indicating that Bottom Lock is on. (See Figure

19).

Bottom Lock will give an expanded view up from the bottom. You will notice that as the

bottom depth changes, the zoom range will also change to maintain its position to the

bottom. You will find that the bottom lock feature is easiest to use on a relatively smooth

bottom or at slow trolling speeds.

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Humminbird LCR 8000D User manual

Brand: Humminbird

Model: LCR 8000D

Type: User manual

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